# -----------------------------------------------------------------------------
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#
# This software is dual-licensed to you under the Universal Permissive License
# (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
# 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
# either license.
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# the following applies:
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# Licensed under the Apache License, Version 2.0 (the "License");
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#    https://www.apache.org/licenses/LICENSE-2.0
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# -----------------------------------------------------------------------------
# return_numbers_as_decimals.py
#
# Returns all numbers as decimals. This is needed if the full decimal
# precision of Oracle numbers is required by the application. See this article
# (http://blog.reverberate.org/2016/02/06/floating-point-demystified-part2.html)
# for an explanation of why decimal numbers (like Oracle numbers) cannot be
# represented exactly by floating point numbers.
# -----------------------------------------------------------------------------

import oracledb
import sample_env

# A global indicating that NUMBER columns should be fetched as decimal.Decimal.
# You can do the same in execute() calls by passing a fetch_decimals parameter.
oracledb.defaults.fetch_decimals = True

# determine whether to use python-oracledb thin mode or thick mode
if sample_env.run_in_thick_mode():
    oracledb.init_oracle_client(lib_dir=sample_env.get_oracle_client())

connection = oracledb.connect(
    user=sample_env.get_main_user(),
    password=sample_env.get_main_password(),
    dsn=sample_env.get_connect_string(),
    params=sample_env.get_connect_params(),
)

with connection.cursor() as cursor:
    cursor.execute("select * from TestNumbers")
    for row in cursor:
        print("Row:", row)
